I spoke with someone from AOPA's Medical Resources line. This is for AOPA members but the woman I spoke with was still kind enough to give me a few minutes of her time and a few basic pointers. AOPA has really been a great group of people in all my experiences with them.
Anyway she said the FAA will likely not make a big deal about it since neither of the surgeries nor the underlying conditions sound like something I would of gotten grounded over. She suggested I note them on my next medical application and should also include a letter outlined that I am making a correction to my record and the details of that correction.
I typed up the letter and my appointment with the AME is this upcoming Monday. I'll let you all know how it turns out.